The areas under the advisory include southern Oxford, Cumberland, York, Kennebec, and Androscoggin counties.

Temperatures are expected to rise into the 90s across much of the area, with some locations touching 100 degrees. The high temperatures combined with the high dew point will make for dangerously hot conditions, especially Friday afternoon.

The National Weather Service said heat index values will rise above 100 degrees by late-morning and remain high through the afternoon.

A heat advisory means that a period of hot temperatures is expected. The combination of high humidity will combine to create a situation where heat illnesses are possible, according to the weather service.

People are encouraged to drink plenty of fluids, stay in an air conditioned room, stay out of the sun and check on relatives and neighbors.

Saturday will continue to be humid with strong thunderstorms expected. Highs will be in the mid-80s.

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